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taninamdar's user avatar
taninamdar's user avatar
taninamdar
  • Member for 11 years, 2 months
  • Last seen more than a week ago
  • India
7 votes
Accepted

How to evaluate $ \lim_{x\to -\infty} x \sin \left(\frac{1}{x}\right)\quad?$

7 votes

Is this a valid use of l'Hospital's Rule? Can it be used recursively?

6 votes
Accepted

Deriving $\frac{8}{\sqrt{x-2}}$

6 votes
Accepted

Prove that $\frac {1}{a_1a_2} + \frac {1}{a_2a_3} + \frac {1}{a_3a_4} + ... + \frac {1}{a_{n-1}a_n} = \frac {n-1}{a_1a_n}$

5 votes
Accepted

Finding b such that the line $y=10x$ is tangent to $y=e^{bx}$

5 votes
Accepted

Proving $\sum\limits_{i=1}^n i^2$ is $O(n^3)$

5 votes
Accepted

Can someone explain this proof by case example?

4 votes
Accepted

For which values of $b,c$ is the matrix invertible?

4 votes

How many 10 bit words contain at least three '1' and three '0'?

3 votes

Find the roots of the quadratics function

3 votes

Determine the constant (that is, the coefficient of $x^0$) in $ (3x^2 - \frac{2}{x})^{15}$

3 votes

Big-O Function for f(x)

3 votes

Sequence of alternating $0$'s and $1$'s in terms of $i$?

3 votes

How would you get to $\tan(\theta/2)$ if you are given $\sin\theta/(1+\cos\theta)$?

3 votes
Accepted

node in quadrilateral

3 votes
Accepted

Solving basic combinatorics

3 votes

Pigeon Hole Problem with 3 integers

3 votes

Proving maximum of dot product using derivatives

3 votes
Accepted

By using De Moivre's Theorem, show that $\cos5\theta = 16\cos^5 \theta - 20 \cos^3 \theta + 5 \cos \theta$

3 votes
Accepted

How can I scale up a number to be the same percentage of another number?

3 votes
Accepted

What type of series expansion is this?

3 votes

Proof that $n \geq (1+\frac{1}{2n})^n$

3 votes

Methods to prove $\frac{21n + 4}{14n + 3}$ is irreducible for every natural number $n$

3 votes
Accepted

Probability of Fair Die

3 votes
Accepted

Find a unit vector from the direction (3, -1, 4) to (1, 3, 5)

2 votes

Can $u\cdot v=-7$ if $||u||=3$ and $||v||=2$?

2 votes

Reducing this binomial expression

2 votes
Accepted

Which integration of tan x is correct?

2 votes

Is $\ (x-x^7)\ $ factorable?

2 votes

How to verify by induction that 1(1!) + 2(2!) + ... + n(n!) = (n+1)! - 1 for every pos. int. n?